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<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>对象方法扩展</title>
</head>
<body>
    <script>
        //1. Object.is 判断两个值是否完全相等 
        // console.log(Object.is(120, 120));// === 
        // console.log(Object.is(NaN, NaN));// === 
        // console.log(NaN === NaN);// === 

        //2. Object.assign 对象的合并
        // const config1 = {
        //     host: 'localhost',
        //     port: 3306,
        //     name: 'root',
        //     pass: 'root',
        //     test: 'test'
        // };
        // const config2 = {
        //     host: 'http://atguigu.com',
        //     port: 33060,
        //     name: 'atguigu.com',
        //     pass: 'iloveyou',
        //     test2: 'test2'
        // }
        // console.log(Object.assign(config1, config2));

        //3. Object.setPrototypeOf 设置原型对象  Object.getPrototypeof
        const school = {
            name: '尚硅谷'
        }
        const cities = {
            xiaoqu: ['北京','上海','深圳']
        }
        Object.setPrototypeOf(school, cities);
        console.log(Object.getPrototypeOf(school));
        console.log(school);


        
    </script>
</body>
</html>